<!DOCTYPE html>
<html>

<head>
  <meta charset="UTF-8" />
  <title>Hello World</title>
  <script src="https://unpkg.com/react@18/umd/react.development.js"></script>
  <script src="https://unpkg.com/react-dom@18/umd/react-dom.development.js"></script>

  <!-- Don't use this in production: -->
  <script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
</head>

<body>
  <div id="root"></div>
  <script type="text/babel">

    function MyApp() {
      return <h1>Hello, world!</h1>;
    }

    const container = document.getElementById('root');
    const root = ReactDOM.createRoot(container);
    root.render(<MyApp />);

  </script>

</body>

</html>